Hostname: page-component-586b7cd67f-vdxz6 Total loading time: 0 Render date: 2024-11-27T20:31:32.341Z Has data issue: false hasContentIssue false
  • English
  • Français

Determination of Shape of Kaolin Pigment Particles

Published online by Cambridge University Press:  09 July 2018

R. A. Slepetys  and
A. J. Cleland
R. A. Slepetys
Affiliation:
Engelhard Corporation, 101 Wood Ave., Iselin, NJ 08830, USA
A. J. Cleland
Affiliation:
Engelhard Corporation, 101 Wood Ave., Iselin, NJ 08830, USA
Get access Rights & Permissions [Opens in a new window]

Abstract

Characterization of platiness of kaolin pigments was derived from the divergence of measurements of their particle size distribution by two different techniques: sedimentation and light scattering. A numerical shape factor, which is related to the ratio of kaolin particle face diameter to its thickness, can be calculated to provide a quantitative measure of such platiness. Two sets of kaolin pigments were prepared from a Middle Georgia kaolin: delaminated and non-delaminated. Shape factors of delaminated samples were higher than those of non-delaminated ones. Maximum platiness was found between equivalent volume diameters of 1·0 and 2·0 μm. Examples are presented where properties of coated paper are correlated with the size and shape of kaolin pigments.

Type
Research Article
Information
Clay Minerals , Volume 28 , Issue 4 , December 1993 , pp. 495 - 508
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1993

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Asano, S. (1979) Light scattering properties of spheroidal particles. Appl. Optics 18, 712–713.Google Scholar
Asano, S. & Sato, M. (1980) Light scattering by randomly oriented spheroidal particles. Appl. Optics 19, 962–974.Google Scholar
Asano, S. & Yamamoto, G. (1975) Light scattering by a spheroidal particle. Appl. Optics 14, 29-A9.CrossRefGoogle Scholar
Barber, P.W. & Massoudi, H. (1982) Recent advances in light scattering calculations for nonspherical particles. Aerosol Sci. Techn. 1, 303–315.Google Scholar
Barber, P.W. & Wang, D.S. (1978) Rayleigh-Gans-Debye applicability to scattering by nonspherical particles. Appl. Optics 17, 797–803.CrossRefGoogle Scholar
Bohren, C.F. & Huffmann, D.R. (1983) Absorption and Scattering of Light by Small Particles, pp. 479-482. John Wiley & Sons, New York.Google Scholar
Bruno, M.H. (1985) Principles of contact (impression) printing processes. P. 4 in: Printing Fundamentals (A. Glassman, editor). TAPPI, Atlanta.Google Scholar
Bundy, W.M. & Ishley, J.N. (1991) Kaolin in paper filling and coating. Appl. Clay Sci. 5, 397–20.Google Scholar
Bundy, W.M., Johns, W.D. & Murray, H.H. (1965) Physicochemical properties of kaolinite and relationship to paper coating quality. TAPPI 48, 688-695.Google Scholar
Conley, R.F. (1966) Statistical distribution patterns of particle size and shape in the Georgia kaolins. Clays Clay Miner. 14, 317–330.CrossRefGoogle Scholar
Grim, R.E. (1968) Clay Mineralogy, 2nd edition, pp. 165-184. McGraw-Hill, New York.Google Scholar
Gunn, F.A. & Morris, H.H. (1965) Delaminated domestic sedimentary clay products and method of preparation thereof. US Patent 3, 171, 718, Ex. 7.Google Scholar
Hardy, R.E., Welch, L.J. & Jones, M.M. (1990) An investigation of delaminated kaolin clay and the effects on coated sheet properties. TAPPI Coating Conf. Proc., 251-257.Google Scholar
Hill, S.C., Hill, A.C. & Barber, P.W. (1984) Light scattering by size/shape distributions of soil particles and spheroids. Appl. Optics 23, 1025–1031.CrossRefGoogle Scholar
Jennings, B.R. & Parslow, K. (1988) Particle size measurement: the equivalent spherical diameter. Proc. Roy. Soc. London A419, 137-149.Google Scholar
Jepson, W.B. (1984) Kaolins: their properties and uses. Phil. Trans. Roy. Soc. London A311, 411-132.Google Scholar
Lyons, S.C. (1966) Clay. Pp. 85-86,104-108 in: Paper Coating Pigments (H.H. Murray, editor). Tappi, New York.Google Scholar
Miller, C.J. (1985) Tests for gravure printing. P. 274 in: Printing Fundamentals (A. Glassman, editor). TAPPI, Atlanta.Google Scholar
Morris, H.H., Sennett, P. & Drexel, R.J., Jr. (1965) Delaminated clays—physical properties and paper coating properties. TAPPI 48, 92A-99A.Google Scholar
Parslow, K. & Jennings, B.R. (1986) Simultaneous size and thickness measurements for heterogeneous micrometre-sized particles. J. Phys. D: Appl. Phys. 19, 1233–1243.Google Scholar
Sennett, P.S., Massey, H.L. & Morris, H.H. (1982) Effect of pigment particle size and shape on rotogravure print quality of light weight coated paper. TAPPI 65, 95-99.Google Scholar
Smook, G.A. (1982) Handbook for Pulp and Paper Technologists, pp. 264-273 and 323-327. TAPPI, Atlanta, and Canadian Pulp and Paper Association, Montreal.Google Scholar
Weiner, J. (1965) The Dictionary of Paper. American Pulp and Paper Association, New York.Google Scholar
Welch, L.J. & Price, C.R. (1984) Improved rotogravure printability through specialty delaminated clays. TAPPI 67, 66-70.Google Scholar